From 3fee8b402e3efefc341a0c1ce0474deb748858b2 Mon Sep 17 00:00:00 2001
From: hathach <thach@tinyusb.org>
Date: Tue, 17 Jan 2023 16:20:04 +0700
Subject: update makefile to support iar build starting with stm32f070

---
 examples/rules.mk | 120 +++++++++++++++++++++++++++++++++++++++---------------
 1 file changed, 87 insertions(+), 33 deletions(-)

(limited to 'examples/rules.mk')

diff --git a/examples/rules.mk b/examples/rules.mk
index c3134056a..2c4df85ba 100644
--- a/examples/rules.mk
+++ b/examples/rules.mk
@@ -46,39 +46,57 @@ INC += $(TOP)/src
 
 CFLAGS += $(addprefix -I,$(INC))
 
+ifdef USE_IAR
+
+IAR_CFLAGS += $(CFLAGS) -e --debug
+IAR_LDFLAGS += --config $(TOP)/$(IAR_LD_FILE)
+
+else
+
+CFLAGS += $(GCC_CFLAGS)
+
 # LTO makes it difficult to analyze map file for optimizing size purpose
 # We will run this option in ci
 ifeq ($(NO_LTO),1)
 CFLAGS := $(filter-out -flto,$(CFLAGS))
 endif
 
-ifneq ($(LD_FILE),)
-LDFLAGS_LD_FILE ?= -Wl,-T,$(TOP)/$(LD_FILE)
+LDFLAGS += $(CFLAGS) -Wl,-Map=$@.map -Wl,-cref -Wl,-gc-sections
+
+ifdef LD_FILE
+LDFLAGS += -Wl,-T,$(TOP)/$(LD_FILE)
 endif
 
-LDFLAGS += $(CFLAGS) $(LDFLAGS_LD_FILE) -Wl,-Map=$@.map -Wl,-cref -Wl,-gc-sections
 ifneq ($(SKIP_NANOLIB), 1)
 LDFLAGS += -specs=nosys.specs -specs=nano.specs
 endif
 
 ASFLAGS += $(CFLAGS)
 
+endif
+
+# Verbose mode
+ifeq ("$(V)","1")
+$(info CFLAGS  $(CFLAGS) ) $(info )
+$(info LDFLAGS $(LDFLAGS)) $(info )
+$(info ASFLAGS $(ASFLAGS)) $(info )
+endif
+
 # Assembly files can be name with upper case .S, convert it to .s
 SRC_S := $(SRC_S:.S=.s)
+IAR_SRC_S := $(IAR_SRC_S:.S=.s)
 
 # Due to GCC LTO bug https://bugs.launchpad.net/gcc-arm-embedded/+bug/1747966
 # assembly file should be placed first in linking order
 # '_asm' suffix is added to object of assembly file
+ifdef USE_IAR
+OBJ += $(addprefix $(BUILD)/obj/, $(IAR_SRC_S:.s=_asm.o))
+else
 OBJ += $(addprefix $(BUILD)/obj/, $(SRC_S:.s=_asm.o))
-OBJ += $(addprefix $(BUILD)/obj/, $(SRC_C:.c=.o))
-
-# Verbose mode
-ifeq ("$(V)","1")
-$(info CFLAGS  $(CFLAGS) ) $(info )
-$(info LDFLAGS $(LDFLAGS)) $(info )
-$(info ASFLAGS $(ASFLAGS)) $(info )
 endif
 
+OBJ += $(addprefix $(BUILD)/obj/, $(SRC_C:.c=.o))
+
 # ---------------------------------------
 # Rules
 # ---------------------------------------
@@ -96,9 +114,15 @@ else
 	@$(MKDIR) -p $@
 endif
 
-$(BUILD)/$(PROJECT).elf: $(OBJ)
-	@echo LINK $@
-	@$(CC) -o $@ $(LDFLAGS) $^ -Wl,--start-group $(LIBS) -Wl,--end-group
+# We set vpath to point to the top of the tree so that the source files
+# can be located. By following this scheme, it allows a single build rule
+# to be used to compile all .c files.
+vpath %.c . $(TOP)
+vpath %.s . $(TOP)
+vpath %.S . $(TOP)
+
+ifndef USE_IAR
+# GCC based compiler
 
 $(BUILD)/$(PROJECT).bin: $(BUILD)/$(PROJECT).elf
 	@echo CREATE $@
@@ -108,42 +132,73 @@ $(BUILD)/$(PROJECT).hex: $(BUILD)/$(PROJECT).elf
 	@echo CREATE $@
 	@$(OBJCOPY) -O ihex $^ $@
 
-# UF2 generation, iMXRT need to strip to text only before conversion
-ifeq ($(FAMILY),imxrt)
-$(BUILD)/$(PROJECT).uf2: $(BUILD)/$(PROJECT).elf
-	@echo CREATE $@
-	@$(OBJCOPY) -O ihex -R .flash_config -R .ivt $^ $(BUILD)/$(PROJECT)-textonly.hex
-	$(PYTHON) $(TOP)/tools/uf2/utils/uf2conv.py -f $(UF2_FAMILY_ID) -c -o $@ $(BUILD)/$(PROJECT)-textonly.hex
+$(BUILD)/$(PROJECT).elf: $(OBJ)
+	@echo LINK $@
+	@$(LD) -o $@ $(LDFLAGS) $^ -Wl,--start-group $(LIBS) -Wl,--end-group
+
+$(BUILD)/obj/%.o: %.c
+	@echo CC $(notdir $@)
+	@$(CC) $(CFLAGS) -c -MD -o $@ $<
+
+# ASM sources lower case .s
+$(BUILD)/obj/%_asm.o: %.s
+	@echo AS $(notdir $@)
+	@$(AS) $(ASFLAGS) -c -o $@ $<
+
+# ASM sources upper case .S
+$(BUILD)/obj/%_asm.o: %.S
+	@echo AS $(notdir $@)
+	@$(AS) $(ASFLAGS) -c -o $@ $<
+
 else
-$(BUILD)/$(PROJECT).uf2: $(BUILD)/$(PROJECT).hex
+
+# IAR Compiler
+
+$(BUILD)/$(PROJECT).bin: $(BUILD)/$(PROJECT).elf
 	@echo CREATE $@
-	$(PYTHON) $(TOP)/tools/uf2/utils/uf2conv.py -f $(UF2_FAMILY_ID) -c -o $@ $^
-endif
+	@$(OBJCOPY) --bin $^ $@
 
-copy-artifact: $(BUILD)/$(PROJECT).bin $(BUILD)/$(PROJECT).hex $(BUILD)/$(PROJECT).uf2
+$(BUILD)/$(PROJECT).hex: $(BUILD)/$(PROJECT).elf
+	@echo CREATE $@
+	@$(OBJCOPY) --ihex $^ $@
+
+$(BUILD)/$(PROJECT).elf: $(OBJ)
+	@echo LINK $@
+	@$(LD) $(IAR_LDFLAGS) $^ -o $@
 
-# We set vpath to point to the top of the tree so that the source files
-# can be located. By following this scheme, it allows a single build rule
-# to be used to compile all .c files.
-vpath %.c . $(TOP)
 $(BUILD)/obj/%.o: %.c
 	@echo CC $(notdir $@)
-	@$(CC) $(CFLAGS) -c -MD -o $@ $<
+	@$(CC) $(IAR_CFLAGS) -c -o $@ $<
 
 # ASM sources lower case .s
-vpath %.s . $(TOP)
 $(BUILD)/obj/%_asm.o: %.s
 	@echo AS $(notdir $@)
-	@$(CC) -x assembler-with-cpp $(ASFLAGS) -c -o $@ $<
+	@$(AS) $(IAR_ASFLAGS) -c -o $@ $<
 
 # ASM sources upper case .S
-vpath %.S . $(TOP)
 $(BUILD)/obj/%_asm.o: %.S
 	@echo AS $(notdir $@)
-	@$(CC) -x assembler-with-cpp $(ASFLAGS) -c -o $@ $<
+	@$(AS) $(IAR_ASFLAGS) -c -o $@ $<
 
 endif
 
+# UF2 generation, iMXRT need to strip to text only before conversion
+ifeq ($(FAMILY),imxrt)
+$(BUILD)/$(PROJECT).uf2: $(BUILD)/$(PROJECT).elf
+	@echo CREATE $@
+	@$(OBJCOPY) -O ihex -R .flash_config -R .ivt $^ $(BUILD)/$(PROJECT)-textonly.hex
+	$(PYTHON) $(TOP)/tools/uf2/utils/uf2conv.py -f $(UF2_FAMILY_ID) -c -o $@ $(BUILD)/$(PROJECT)-textonly.hex
+else
+$(BUILD)/$(PROJECT).uf2: $(BUILD)/$(PROJECT).hex
+	@echo CREATE $@
+	$(PYTHON) $(TOP)/tools/uf2/utils/uf2conv.py -f $(UF2_FAMILY_ID) -c -o $@ $^
+endif
+
+copy-artifact: $(BUILD)/$(PROJECT).bin $(BUILD)/$(PROJECT).hex $(BUILD)/$(PROJECT).uf2
+
+endif
+# ---------------- GNU Make End -----------------------
+
 .PHONY: clean
 clean:
 ifeq ($(CMDEXE),1)
@@ -151,7 +206,6 @@ ifeq ($(CMDEXE),1)
 else
 	$(RM) -rf $(BUILD)
 endif
-# ---------------- GNU Make End -----------------------
 
 # get depenecies
 .PHONY: get-deps
-- 
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